US3925376A - Piperidine derivatives - Google Patents

Abstract

New piperidine derivatives of 1,3-pyrimidine and 1,3,5-triazine are used as stabilisers for organic materials, especially for polymers.

Description

Chalmers et al.

PIPERIDINE DERIVATIVES Inventors: Alexander Michael Chalmers,

Cheadle Hulme; James Jack, Bramhall; Barry Cook, Manchester,

Appl No: 350,296

Foreign Application Priority Data Apr. 2], I972 United Kingdom [8558/72 Feb. 3, [973 United Kingdom 5469/73 US. Cl.,.... 260/248 CS; 260/2495; 260/2498; 260/249.6; 260/458 N; 260/2564 C; 260/2564 R; 260/2565 R lnt. Cl. C07D 251/26 Dec. 9, 1975 [58] Field of Search 7, 260/248 CS, 2496, 249.5, 260/2498 [56] References Cited UNITED STATES PATENTS 3,156,689 11/1964 Dexter et a] 260/2498 X 3,156,690 1 [/1964 Dexter et a] 260/2498 X 3,734,883 5/1973 Holt 260/458 N FOREIGN PATENTS OR APPLICATIONS 2,227,689 l2/l972 German Primary Examiner-John M. Ford Attorney, Agent, or FirmNest0r W. Shust [57] ABSTRACT New piperidine derivatives of LES-pyrimidine and 1,3,5-lriazine are used as stabilisers for organic materials, especially for polymers.

ll Claims, N0 Drawings PIPERIDINE DERIVATIVES The present invention relates to new compounds useful as stabilisers for organic material and in particular to new piperidine derivatives useful for the stabilisation of polymers.

in British Pat. Specification No. 977,587 there are described compounds having the formula:

and salts thereof, wherein U is CH or N and Z is a residue having the formula wherein R and R, are the same or different and each is a straightor branched alkyl residue having from I to 12 carbon atoms, or R, and R, form, together with the 2 residue, wherein R is hydrogen, a straight or branched alkyl residue having from i to 20 carbon atoms or an aralkyl residue having from 7 to 12 carbon atoms; Y is 0, hydrogen, a straight or branched alkyl residue having from I to 20 carbon atoms, an alkenyl or alkynyl residue having from 3 to 12 carbon atoms, an aralkyl residue having from 7 to l2 carbon atoms or the group wherein R is hydrogen, or a methyl or phenyl residue; n is 0 or I; and A is CH,-, or the group wherein R, is hydrogen or an alkyl residue having from i to 20 carbon atoms; 2' and Z' are the same or different and each is a piperidine residue of formula ll as hereinbefore defined, a halogen atom, a substituted amino group having the formula:-

wherein R and R are the same or different and each is hydrogen, a straightor branched alkyl residue having from I to 20 carbon atoms, a cycloalkyl residue having from 5 to 12 carbon atoms, an aryl residue which is unsubstituted or substituted by one or more alkyl groups and having a total of from 6 to 18 carbon atoms or an aralkyl residue having from 7 to 12 carbon atoms; or R and R together with the nitrogen atom to which they are bound form a heterocyclic residue having 5 to 7 ring atoms; or Z" and Z' are an hydroxy or ether group having the formula:-

oR. IV wherein R, is hydrogen, a straightor branchedchain alkyl residue having from 1 to 20 carbon atoms, a cycloalkyl residue having from 5 to 12 carbon atoms, an aryl residue which may be unsubstituted or substituted by one or more alkyl groups, having a total of 6 to 18 carbon atoms or an aralkyl residue having from 7 to 12 carbon atoms; or Z" and Z' are a thiol or thio ether group having the formula:

, V wherein R6 is hydrogen, a straightor branched alkyl residue having from 1 to 20 carbon atoms, a cycloalkyl, having from 5 to 12 carbon atoms or a phenyl or benzyl residue.

Preferably, the ring atom U is -N.

Examples of alkyl substituents R, and R, include methyl, ethyl, n-propyl, isopropyl, n-butyl, secbutyl, nhexyl, n-octyl and n-dodecyl residues; however, preferred alkyl residues R, and R, are those having from 1 to 4 carbon atoms and most preferably R, and R are each a methyl residue.

When the residue R, and R together with the carbon atom to which they are bound, form a cycloalkyl group, examples of such cycloalkyl groups are those of formula:

CH a

Examples of the residue X are O, S, -NH- and NR, wherein R, is a methyl, ethyl, isobutyl, nhexyl, n-decyl, n-eicosyl or benzyl residue. Preferably, however, X is O- or NH.

Examples of Y, apart from hydrogen and O, are methyl, ethyl, n'propyl, isopropyl, n-butyl, sec-butyl, n-hexyl, n-octyl, n-dodecyl, allyl, a-methallyl, lundecenyl, prop-2-ynyl, benzyl, a-methylbenzyl, pmethylbenzyl, p-methyl-a-methylbenzyl, a-naphthylmethyl and B-hydroxyethyl, B-hydroxypropyl or B- hydroxy-fi-phenyl ethyl residues. Particularly preferred substitutent Y however are hydrogen and straight or branched alkyl residues having from I to 4 carbon atoms, the most preferred substituents being hydrogen and methyl residues.

Examples of residue A when n is l are CH,, and

wherein R, is hydrogen, a methyl, ethylpisopropyl, secbutyl, n-hexyl, n-decyl or n-eicosyl residue. Preferably R, is hydrogen and preferably, either n is 0 or n is l and A is -CH,CH,-.

A particular sub-group of Z" and/or 2' are substituted amine groups-Nk R, wherein examples of substituents R, and R apart from hydrogen, are methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, n-hexyl, n-octyl, n-dodecyl, n-eicosyl, cyclopentyl, cyclohexyl, cyclododecyl, p-methylphenyl, p-t-butylphenyl, p-ndodecylphenyl, benzyl, a-methylbenzyl and a-naphthylmethyl residues; substituents R, and R are, however, preferably hydrogen or an alkyl residue having from 6 to carbon atoms.

when the residues R, and R, together with the nitrogen atom to which they are bound form a heterocyclic residue, the heterocycle may contain further heteroatoms such as a further nitrogen atom or an oxygen atom to which they are bound. Examples of such heterocyclic residues are pyrrolidin-l-yl, piperidino, Z-methylpiperidino, 4-n-hexylpiperidino, morpholino, piperazin-l-yl, 2-methylhexahydroazepin-l-yl; preferred heterocyclic residues, however, are morpholino and piperidino residues.

Examples of substituent R apart from hydrogen, are methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, n-hexyl, n-octyl, n-dodecyl, n-eicosyl, cyclopentyl, cyclohexyl, cyclododecyl, phenyl, p-rnethylphenyl, tbutylphenyl, p-n-dodecylphenyl, benzyl, a-methylbenzyl, p-methyl-a-methylbenzyl and a-naphthylmethyl residues; substituent R is, however, preferably an alkyl group having from 6 to 20 carbon atoms.

Examples of substituent R,,, apart from hydrogen, are methyl, ethyl, n-propyl, isopropyl, n-butyl, secbutyl, nhexyl, n-octyl, n-dodecyl, n-eicosyl, cyclopentyl, cyclohexyl, cyclododecyl, phenyl and benzyl. The preferred substituent R is an alkyl residue having from 6 to 20 carbon atoms.

Preferably, Z" and Z' are each the same or different piperidine residue ll. In less preferred embodiments, Z" and/or 2'' are halogen, preferably chlorine, N-alkyl substituents or S-alkyl substituents.

The invention also includes salts of the compounds of formula I for instance salts of inorganic acids such as phosphates, carbonates, sulphates and chlorides and salts of organic acids such as acetates, stearates, maleates, citrates, tartrates, oxalates, benzoates and substituted carbamic acids.

A preferred sub-group of compounds are those having the formula:-

wherein D, D" and D"' are the same or different and each is halogen or a residue of formula:-

1 RI] g a wherein R,'and R, are the same or different and each is a straight or branched allryl residue having from 1 to 12 carbon atoms, or R, and R together with the carbon atom to which they are bound, form a cycloalkyl residue having from 5 to 12 carbon atoms, X is an -O, -S or NR-, residue wherein R, is hydrogen, an alkyl residue having from 1 to 12 carbon atoms or an aralkyl residue having from 7 to 12 carbon atoms, Y is 0, hydrogen, an alkyl residue having from I to 12 carbon atoms, an alkenyl or alkynyl residue having from 3 to 12 carbon atoms, an aralkyl residue having from 7 to 12 carbon atoms or the group:

3 ,925 ,3 76 6 1- 6-chloro-2,4-bis[2',2',6',6'-tetramethylpiperidinyli 4-amino]-1,3-pyrimidine 6-chloro-2,6-bis[ l '-ethyl-2',2',6,6-tetramethyly 5 piperidinyl-4'-amino]-l ,3-pyrimidine wherein R IS hydrogen, or a methyl or phenyl residue, 4 1 2 2'3 z w i -4' n is O or l and A' is CH:, or aminoLlJTw-imidine 2-methylamino-4,6-bis[2',2',6',6'-tetramethylpiperidinyl-4'-amino]-l,3,5-triazine i m 2-ethylamino-4,6-bis[2,2',6,6'-tetramethylpiperidinyl-4'-amino]-l ,3 ,S-triazine 2-iso-propylamino-4,6bis[ 2',2',6',6'-tetramethylwherein R is hydrogen or an alkyl residue having from P P Y ll to 12 carbon atoms; with the proviso that at least one 2 n-heXylaminO 46 biS[2',2"6"6 tetramethy]' of D, D" and D' is not a halogen atom; and salts of 15 P p y l- ,3i5-triflline these compounds. 2-n-octydecylamino-4,6-bis[2',2',6',6-tetramethyl- Within the group of compounds'of formula IA, these p p y 1- ,3.5-U'iaZin6 compounds are preferred wherein D, D" and D" are 2-cyclopentylamino-4.fiy the same or different piperidine residue of formula HA. p p y l .3.5-lrialil1e More preferably, residues D, D" and D are the same -y y i y piperidine residue llA. It is also preferred that X is P P Y lor n is 0 RI and R2 are each a methyl 2-cyclododecylamino-4,6-bis[2',2',6,6'-tetrameresidue and Y is hydrogen or an alkyl residue having y P P y li from 1 to 4 carbon atoms, especially a methyl residue. y 1 y A further sub-group of preferred compounds of for- P P y ,3i5'il'ialine mula l are those of formula; Z-ethyl-n-propylamino-4,6-bis[2',2,6',6'-tetrameg I u c A ail CH3 R o N O In an R wherein R," and R are the same or different and thylpiperidinyl-4'-amino]-l,3,S-triazine each is a straightor branched-chain alkyl group having 2-methyl-n-decylarnino-4,6-bis[2',2',6,6'-tetramefrom 1 to 12 carbon atoms or R," and R,", together thylpiperidinyl-4-amino]-l,3,5-triazine with the carbon atom to which they are each bound, 2-anilino-4,6-bis[2',2',6,6'-tetramethylpiperidinylform a cycloalkyl residue having from 5 to 12 carbon 4-amin0]-I,3,5-triazine atoms, and Y" is hydrogen, a straightor branched- 2-(p-t-butylanilino)-4,6-bis[2,2',6,6'-tetramethylchain alkyl group having from I to 12 carbon atoms, an i ridi l-4'-amino]-l ,3,5-rriazine alkenyl group having from 3 to 12 carbon atoms or an 2-(p-methylanilino)-4,6-bis[2',2',6',6-tetramethylaralkyl group having from 7 to 12 carbon atoms; and i idi l-4-amin ]-1,3,5-triazine salts of these compounds. 2-(p-n-dodecylanilino)-4,6-bis[2',2',6',6-tetrameit is preferred that substituents Rf, R," and each a i i i mu i 1. ,3,5- i i methyl residue and that Y" is hydrogen or a lower alkyl 2 i 4 2' 2', h 1- residue, especially a methyl residue. i ridin l-4'-amino]-l ,3,5-triazine Specific examples of compounds of formula I ing h 4 2"2' 5' elude: ramethylpiperidinyl-4'-amino]-l ,3,5-triazine 3 3 y p p y 2-amino-4,6-bis[2,2',6',6'-tetramethylpiperidinylamino]- 1 ,B-pyrimidine 4'-amino 1-1 ,3,S-triazine l "P y p p 2-hydroxy-4,6-bis[2,2',6,6'-tetramethylpiperidinylamino]-1.3-pyrimidin 4'-amino 1-1 ,3 ,S-triazine 1 1 2,4-Dichloro-6-( l ',2',2',6,6'-pentamentyl piperidinyl-4'-oxy l ,3 ,S-triazine 2,4-Dichloro-6-( l 'oxyl-Z',2,6,6-tetramethyl piperidinyl-4-oxy)-1,3,5-triazine 2,4-Dichloro-6-( 2',2',6',6'-tetramcthyl piperidinyl- 4-ethylenoxy)-l ,3,S-triazine 2 ,4-Dich|oro-6-( 2',2',6,6'-tetramethyl piperidinyl- 4'-ethylenamino)-l ,3,5-triazine 2,4-Dichloro-6-(2'2',6',6-tetra methyl piperidinyl- 4'-methylenoxy )-l ,3 ,5 -triazine 2,4-Dichloro-6-(2',2',6',6'-tetra methyl piperidinyl- 4'-methylen amino)l ,3,5-triazine 2,4,6Tris[ l -/3-hydroxyethyl-2',2',6,6'-tetramethylpiperidinyl-4'-oxy]1,3,5-triazine 2,4,6-Tris[ l '-B-hydroxyethyl-2',2',6,6'-tetramethylpiperidinyl-4 amino ]-1 ,3 ,S-triazine 2,4,6-Tris[ l -B-hydroxuethyl-2',2',6',6'-tetramethylpiperidinyl-4-ethyleneaminol'l ,3,5-triazine 2,4,6Tris[ l -[3-hydroxypropyl-2',2',6',6'-tetramethylpiperidinyl-4'-oxy]-l ,3,5-triazine 2,4,6-Tris[ l-B-hydroxypropyl-2,2',6,6'-tetramethylpiperidinyl-4'-amino]-l ,3,5-triazine 2,4,6Tris[ l '-B-hydroxy-B-phenylethyl-Z',2',6',6- tetramethylpiperidinyl-4'-oxy]-l ,3 ,S-triazine 2,4,6-Tris[ l '-B-hydroxy-B-phenylethyl-Z',2',6',6- tetramethylpiperidinyl-4'-amino]-l ,3 ,S-triazine as well as the sulphate, chloride, oxalate and acetate salts of the preceding compounds 1A.

Specific examples of compounds of formula lB include:

2,4,6-tris[2',2',6',6-tetramethylpiperidinyl-4'-oxy]- 1,3 ,S-triazine 2,4,6-tris[2',2'-dimethyl-6',6-diethylpiperidinyl-4'- oxy]-l,3,5-triazine 2,4,6-tris[2',2',6'-trimethyl-6-ethylpiperidinyl-4- oxy l ,3 ,S-triazine 2,4.6-tris[2'.2'-dimethyl-6,6-diisopropylpiperidinyl-4 -oxy]-l ,3. 5-triazine 2,4,6tris[2',2'-dimethyl-6',6-di-n-dodecylpiperidinyl-4'-oxy]-1,3,5-triazine 2,4-bis[2,2,6',6-tetramethylpiperidinyl-4'-oxy1-6- l "-aza-2",2' '-dimethylspiro{ 5,5 ]-undecane-4"-oxy]- l,3,5-triazine 2,4,6-tris[ l ,2',2',6,6'-pentamethylpiperidinyl-4'- oxyll ,3,5-triazine 2,4,6-tris[ l '-ethyl-2,2,6',6'-tetramethylpiperidinyl- 4'-oxyl-l,3,5-triazine 2,4,6-tris[ l '-n-butyl-2',2',6',6'-tetramethylpiperidinyl-4'-oxy]- l ,3,5-triazine 2,4,6-tris[ l '-n-dodecyl-2',2',6',6'-tetramethyl' piperidinyl-4'-oxy]-l ,3 ,S-triazine 2,4,6-tris[ l '-allyl-2,2,6',6'-tetramethylpiperidinyl- 4'-oxy I ,3 ,S-triazine 2,4,6-tris[ l -benzyl-2,2,6',6-tetramethylpiperidinyl-4'-oxy]-l ,3,5-triazine 2,4,6-tris[ l '-azal '-benzyl-2,2'-dimethylspiro-[ 5,5 undecane-4'-oxy]- l ,3 ,S-triazine spiro-[ 5,5 ]-undec- 12 2,4-bis[2',2',6,6-tetramethylpiperidinyl-4"oxy)-6- l ",2",2",6",6"-pentamethyl piperidinyl-4"- oxy] 1,3 ,S-triazine 2-[2',2,6',6'-tetramethylpiperidinyl-4'-oxy]-4,6- bis[ 1 ",2",2",6",6"-pentamethyl piperidinyl-4"-oxy]- l ,3,5'triazine.

The present invention also provides a first process for the production of a compound of formula 1 comprising reacting a halogenated l,3,5-triazine or a halogenated pyrimidine preferably a cyanuric halide, especially cyanuric chloride, with the compound having the formula:

CH1: s

Ig-Y (v1) R is; 1

In formula I wherein U is N and wherein Z" and Z' are piperidine residues, the compounds of formula 1 may be symmetrical or unsymmetrical, depending upon the nature of the substituents in the formula VI. For the preparation of symmetrical compounds of formula I, it is convenient to use at least three molecular proportions of the compound of formula VI per molecular proportion of cyanuric halide, preferably cyanuric chloride.

In order to produce an unsymmetrical compound of formula I, dissimilar compounds of formula VI may be added stepwise by introducing one or two residues into the triazine molecule at one time. In this way, two or three different piperidinyl residues may be introduced into the triazine nucleus.

For the preparation of compounds having two identical piperidine residues, the reaction is carried out using at least two molecular proportions of a single compound Vl per molecular proportion of cyanuric halide. it is convenient to carry out the reaction in the presence of a halogen acid binding agent and optionally in the presence of a solvent inert under the reaction conditions. Suitable examples of halogen acid binding agents include organic bases such as triethylamine, inorganic bases such as sodium hydroxide or sodium carbonate; alternatively an excess amount of the amine reactant of formula VI may be employed as the halogen binding agent. if a solvent is used suitable examples of such solvents are toluene and xylene.

In the particular case of compounds of formula VI wherein X is -O, the alkali metal salt of the compound may be first prepared, for instance, by reacting the compound with an alkali metal, prior to reaction with the cyanuric halide.

When Z" and Z' are not both piperidine residues, reaction of the remaining halogen can be accomplished by treating the derived compound with an amine of formula:

or the derived strong acid salt an alcohol of formula:

Holt, Vlll or a thio compound of formula:

HSR, IX

The reaction is conveniently carried out in the presence of a suitable halogen acid binding agent as described above. In the particular case of the amine Vii an excess amount of this reactant may be employed. ln the particular case of the alcohol Vlll the alkali metal salt may first be prepared prior to reaction.

Alternatively these compounds containing two piperidine residues can be prepared by reacting a cyanuric halioe firstly with one molecular proportion of the compounds Vll, Vlll and [X and then by treating the derived dihalogenated material with the piperidine compound VI using the conditions described above.

For compounds containing only one piperidine residue, one molecular proportion of compound Vl may be added, usually at low temperature, to the cyanuric halide using the conditions described above. The derived dihalogenated material can then be treated with one or two molecular proportions of VII, VIII or [X as desired.

Alternatively one or two molecular proportions of the compounds Vll, Vlll or D( may be added to one molecular proportions of a cyanuric halide to yield the dior monohalogenated product which can then be reacted with one molecular proportion of piperidine compound VI.

The present invention also provides a second process for producing a compound of formula l wherein Y is other than hydrogen, comprising reacting the corresponding compound of formula l wherein Y is hydrogen with a compound capable of replacing the hydrogen at the nitrogen atom by the group Y.

For example, the nitrogen substitution reactions may be effected using an alkylating, alkenylating, alkynylating or aralkylating agent such as alkyl, alkenyl, alkynyl or aralkyl halide.

Alternatively, the nitrogen substitution reactions may be carried out by a Leuckart or Wailach reaction using formic acid and the appropriate aldehyde or ketone. For example, the corresponding NH compound may be reacted with formic acid and formaldehyde to produce the N-methyl compound.

To produce a compound of formula I wherein one or more of the substituents Y is a hydroxyalkyl group, the corresponding compound of formula i wherein Y is hydrogen, may be reacted with the appropriate alicylene oxide such as ethylene oxide, propylene oxide or styrene oxide.

To produce a compound of formula I wherein one or more of Y is O, the corresponding compound of formula I wherein the corresponding Y substituent is hydrogen may be oxidised with a peroxide, such as hydrogen peroxide, optionally in the presence of pertungstic acid, or with a per-acid such as performic or peracetic acid. in a modification of this oxidation reaction, the starting-material may be the corresponding N-lower alkyl compound rather than the NH compound of formula 1.

Although in theory this method may be used to produce compounds of formula I in which only one of Y is O, in practice it is very much preferred to conduct the oxidation so that all of Y are otherwise complex mixtures are obtained from which it is difficult to isolate partial N-oxyls of formula I.

It is to be understood that the above processes can' also be used to produce the less preferred compounds of formula I wherein U is CH. The compounds of formula I have been found to be excellent light stabilisers for organic material, especially polymers. Accordingly, the present invention also provides a composition comprising an organic material and, as stabiliser, a

minor proportion of a compound of formula I as hereinbefore defined.

Compounds of formula l have been found to impart to polyolefines an exceptionally high degree of stability towards deterioration normally induced by the effects of ultra-violet radiation or exposure to heat. Moreover, this improved stability is achieved without affecting the colour properties of the treated polyolefine. The stabilisers of the invention provide effective light and/or heat stabilisation, especially for lowand high-density polyethylene and polypropylene and polystyrene as well as polymers of butene-l pentene-i, B-methylbutene-l hexene-l 4-methylpentene'l 4-methylhexenel and 4,4-dimethyl-pentene-l, and also coand terpolymers of olefines, particularly of ethylene or propy lene.

Other organic materials susceptible to degradation by the effects of light and the properties of which are improved by the incorporation therein of a compound of Formula I include natural and synthetic polymeric materials, for instance natural and synthetic rubbers the latter including, for example, homo-, coand terpolymers of acrylonitrile, butadiene and styrene.

Specific synthetic polymers include polyvinyl chloride, polyvinylidene chloride and vinyl chloride co polymers, polyvinyl acetate as well as condensatior polymers derived from ether, eseter (derived from car boxylic sulphonic or carbonic acids), amide or ure thane groupings. These polymers can, for instance form the basis of surface coating media such as paint: and lacquers having an oil or resin, for instance ar alkyd or polyamide resin base. i The amount of the compound of formula I which i: incorporated into the organic material in order tt achieve maximal protection against degradation b light varies according to the properties of the organit material treated and according to the severity of tin light radiation and to the length of exposure. However for most purposes it is sufficient to use an amount 0 the compound of formula 1 within the range of fron 0.01 to 5% by weight, more preferably within the rang of from 0.1 to 2% by weight based on the weight of un treated organic material.

The compounds of formula I may be incorporate into the polymeric material by any of the known tech niques for compounding additives with a polymer. Fo example, the compound of formula 1 and the polyme may be compounded in an internal mixer. Alterna tively, the compound of formula may be added as a sc lution or slurry in a suitable solvent or dispersant, fo instance an inert organic solvent such as methanol, eti anol or acetone to powdered polymer and the whol mixed intimately in a mixer, and the solvent subse quently removed. As a further alternative the con pound of formula I may be added to the polymer durin the preparation of the latter, for instance at the late stage of polymer production, to provide pre-stabilise polymer material.

Optionally, the composition of the invention ma contain one or more further additives, especially thos used in polymer formulations, such as antioxidants r the phenol or amine type, UV. absorbers and light pri tectants, phosphite stabilisers, peroxide decomposer polyamide stabilisers, basic co-stabilisers, polyvin chloride stabilisers, nucleation agents, plasticizers, ll bricants, emulsifiers, anti-static agents, flame-protec ants, pigments, carbon black asbestos, glass fibres, ka' lin and talc.

The present invention therefore includes binary. tertiary and multi-component decompositions containing the stabiliser of formula I together with one or more functional additives for polymers.

Examples of suitable antioxidants are those of the hindered phenol type such as those selected from the following groups:

1. Phenolic compounds having the general formula lllustrative examples of such compounds are: 4 ,4'-thiobis-( 2-t-butyl-5 -methylphenol) 4,4-thiobis-( 2-t-butyl-6-methylphenol) 2,2-thiobis-(6-t-butyl-4-methylphenol) 4,4'-thiobis-(Z-methyI-S-t-butylphenol) 6. Phenolic compounds having the formula lllustrative examples of such compounds are: octadecyl-( 3 ,5-dimethyl-4-hyd roxybenzylthio )-acetate dodel5 cyl-(3 ,5-di-t-butyl-4-hydroxybenzylthio)-propionate Q( H=l. wherein Q is A. is cmcooR"),

illustrative examples of the compounds shown above are 2,6-di-t-butyl-p-cresol 2-methyl-4,6-di-t-butylphenol and the like 2,-di-octadecyl-p-cresol 3. Phenolic compounds having the formula:

lllustrative examples of the compounds shown are: 2,2-methylene-bis(6-t-butyl-4-methylphenol) 2,2'-methylene-bis(6-t-butyl-4-ethylphenol) 4,4-butylidene-bis(2,6-di-t-butylphenol) 4,4'-( Z-butylidene )-bis( Z-t-butyl-S-methylphenol) 2,2 '-methylene-bis[6( 2-t-methylcyclohexyl)-4- methylphenol] 2,2'-methylene-bis(B-t-butyLS-ethylphenol) 4,4 '-methylene-bis( 3 ,S-di-t-butylphenol) 4,4-methylene-bis(3-t-butyl-5-methylphenol) 2,2'-methylene-bis(3-t-butyl-5-methylphenol) the like. 4. Phenolic compounds having the formula:

and

lllustrative examples of such compounds are: 2,S-di-t-butylhydroquinone 2,6-di-t-butylhydroquinone 2,5-di-t-butyl-4-hydroxyanisole 5. Phenolic compounds having the formula:

7. Phenolic compounds having the formula wherein T is hydrogen R or Q as defined above.

lllustrative examples of such compounds are:

l ,1,3-tris(3,5-dimethyl-4-hydroxyphenyl)-propane l, l ,3-tris(5-t-butyl-4-hydroxy-2-methylphenyl)- butane 1,1,5 ,5 -tetrakis-( 3 '-t-butyl-4'-hydroxy-6-methylphenyl)-n-pentane 8. Phenolic compounds having the formula:

'1 CH CH 2 Q 0 cn e 3 CH3 CHZB wherein B, B and l? are hydrogen, methyl or 0. provided that when B and B are 0 then B is hydrogen or methyl and when B is Q then B and I? are hydrogen or methyl.

Illustrative examples of such compounds are:

l,4-di(3 ,5-di-t-butyl-4-hydroxybenzyl)-2,3 ,5 ,6-tetramethylbenzene l,3,5-tri( 3,5-di-t-butyl-4-hydroxybenzyl)-2,4,6-

trimethylbenzene 9. Phenolic compounds having the formula (Q) M H D is alkyl group having from 6 12 carbon atoms or illustrative examples of such compounds are:

2,4-bis-(n-octylthio)6-(3,5-di-t-butyl-4-hydroxyaniline)-l ,3 ,S-triazine 6-(4-hydroxy-3-methyl-5t-butylanilino)-2,4-bis-(noctyl-thio)-l ,3,5-triazine 1,6-n-hexanediol-bisl 3 ,5 '-di-t-butyl-4-hydroxyphenyl) propionatel l2. Phenolic compounds having the formula where .x is an integer of l or 2.

illustrative examples of such compounds are Di-n-octadecyl 3,S-di-t-butyl-4-hydroxybenzyl-phosphonate Di-n-octadecyl 3-t-butyl-4-hydroxy-5-methylbenzylphosphonate Di-n-octadecyl l-(3,5-di-t-butyl-4-hydroxyphenyl)el3. Phenolic compounds having the formula wherein W and Q are defined above.

Illustrative examples of such compounds are:

tris-(3,5-di-t-butyl-4-hydroxybenzyl)isocyanurate tris-(3-t-butyl-4-hydroxy-5-methylbenzyl)isocyanurate. The above phenolic hydrocarbon stabilizers are known and many are commercially available.

While any of the above mentioned antioxidants can be useful in combination with the ultraviolet light stabilizers of this invention, the preferred antioxidants consist of the hindered phenols in groups I, 8, 9, l0, 1 l, 12 and 13 as mentioned above. The most preferred hindered phenols are those of groups 1, 9, ll, 12 and 13.

Further examples of antioxidants are those of the aminoaryl series for instance aniline and naphthylamine derivatives as well as their heterocyclic derivatives such as:

phenyll -naphthylamine phenyI-Z-naphthylamine N ,N '-diphenyl-p-phenyldiamine N,N'-di-sec.butyl-p-phenylenediamine 6-Ethoxy-2,2,4-trimethyl-l ,Z-dihydroquinoline 6-Dodecyl-2,2,4-trimethyl-1,Z-dihydroquinoline Monoand di-octyliminodibenzyl and polymerised 2,2,4-trimethyl-l ,2-dihydroquinoline.

Ultraviolet absorbers and light protectants include a. 2-(2'-hydroxyphenyl)benzotriazoles, for instance -methyl; 3',5'-di-t-butyl; 5'-t-butyl; 5-chloro-3',5 '-dit-butyl; S-chloro-3'-t-butyl-5'-methyl; 3'-sec. butyl-5'- tert.butyl; 3'-[a-methylbenzyl]-5'-methyl-; 3'-[amethylbenzyl)-5'-methyl-5-chloro-; 4-octoxy-; 3,5'-

di-t-amyl; 3'-methyl-5-carbamethoxyethyl; S-chloro- 3',5'-di-tamyl derivatives.

b. 2,4-bis-(2'-hydroxyphenyl)-6-alkyl-S-triazines, for instance the 6-ethyl or 6-undecyl derivatives.

c. Z-hydroxybenzophenones, for instance the 4- hydroxy, 4-methoxy, 4-0ctoxy-, 4-decyloxy-, 4- dodecyloxy-, 4,2, 4'-trihydroxy or 2'-hydroxy-4,4'- dimethoxy derivatives.

d. l,3-Bis(2'-hydroxybenzoyl)-benzenes for instance, l,3-bis-( 2'-hydroxy-4'-hexyloxybenzoyl)benzene 1,3- bis-(2'-hydroxy-4'-octoxybenzoyl)benzene l,3-bis-(2'- hydroxy-4'-dodecyloxybenzoyl)benzene e. Aryl esters from optionally substituted benzoic acids such as phenylsalicylate, octylphenylsalicylate, dibenzoyl resorcinol, bis-(4-tert.butylbenzoyl) resorcinol, benzoylresorcinol and 3,5-di-tert.butyl-4-hydroxybenzoic acid-2,4-di-tert.butyl phenyl ester and -octadecyl ester and -2-methyl-4,6-di-tert.butyl phenyl ester.

f. Acrylates, for instance aCyano-B,B-diphenylacrylic acid ethylor iso-octyl ester, a-carbomethoxy-cinnamic acid, methylor butyl ester and N-(B-carbomethoxyvinyl)-2-methyl indoline.

g. Nickel compounds such as nickel complexes of 2,2-thio-bis-(4-tert.octylphenol), for instance the lzl and I12 complexes, optionally having other ligands such as n-butylamine, triethanolamine or N-cyclohexyl-diethanolamine; nickel complexes of bis-(4-tert.octylphenyl) sulphone such as the 2:] complex, optionally having other ligands such as 2-ethylcarproic acid; nickel dibutyl dithiocarbamates; nickel salts of 4- hydroxy-3,5-cli-tert. butylbenzyl-phosphonic acid mono-alkyl esters such as the methyl-, ethylor butyl esters; the nickel complex of 2-hydroxy-4-methyl-phenyl-undecylketonoxime; ancl nickel-3,5di-tert.butyl-4- hydroxy benzoate, and

h. Oxalic acid diamides, for instanc 4,4'-dioctyloxyoxanilide 2 ,2 '-dioctyloxy-5 ,5 '-di-tert.butyl-oxanilide 2,2'-di-dodecyloxy-S,5 '-di-tert.butyl oxanilide Z-ethoxy-S-tertiarybutyl-2'-ethyl-oxanilide 2-ethoxy-2'-ethyl-oxanilide mixtures of oand p-methoxy and ethoxy-di-substituted oxanilides and the compound of formula:

CH CH;

Phosphite stabilisers include triphenyl phosphite, diphenylalkyl phosphites, phenyl dialkyl phosphites, trinonylphenyl phosphite, trilauryl phosphite, trioctadecyl phosphite, 3,9-di-isodecyloxy-2,4,8,l0-tetraoxa- 3,9-diphosphaspiro-(S,5)-undecane and tri-(4- hydroxy-3 ,5-di-tert.butylpheny1)phosphite.

Peroxide-decomposing compounds for polyolefins include esters of B-thiodipropionic acids, for instance the lauryl-, stearyl-, myristylor tridecyl esters, salts of mercaptobenzimidazoles such as the zinc salt and diphenylthiourea.

Suitable polyarnide stabilisers include copper salts in combination with iodides and/or further phosphorus compounds and salts of bivalent manganese.

Basic co-stabilisers are, for example, polyvinylpyrrolidone, melamine, benzoguanamine, triallyl cyanurate, dicyandiamide, urea derivatives, hydrazine derivatives, amines, polyamides, polyurethanes, alkali and alkaline earth salts of higher saturated or unsaturated fatty acids such as calcium stearate.

Polyvinyl chloride stabilizers include organotin compounds, organo lead compounds and Ba/Cd salts of fatty acids.

Examples of nucleation agents are 4-tert.butyl benzoic acid, adipic acid and diphenylacetic acid.

As with the compound of formula 1, any further additive is advantageously employed in a proportion within the range of from 0.01 to by weight, based on the weight of untreated polymeric material.

In binary combinations with one or more antioxidants listed above or in tertiary combinations with such antioxidants and UV. absorbers listed above, the compounds of formula I provide very effective stabilizer packages in polyolefine formulations.

The halo-compounds of formula 1, in addition to their property of functioning as a stabiliser for organic material, may also find use as intermediates for materials such as other stabilisers.

Some Examples will now be given. Parts and percentages are by weight unless otherwise stated.

EXAMPLE 1 To 28.2 parts of 2,2,6,6-tetramethylpiperidin-4-ol in 200 parts of dry xylene were added in portions 4.2 parts of sodium. This mixture was heated at reflux for 18 hours and then cooled. 10.1 parts of cyanuric chloride were added in portions and the mixture brought to a reflux temperature for 1 hour. Evaporation to dryness under reduced pressure was followed by extraction with petroleum ether (b.p. 6080C.) using a Soxhlet extractor apparatus. Evaporation vacuo gave the desired product contaminated with 2,2,6,6-tetramethylpiperidin-4-ol. Sublimation in vacuo removed this contaminant and the residual colourless solid was crystallised from petroleum ether (b.p. 6080C.) to yield 23.7 parts of 2,4,6-tris[2',2',6,6'-tetramethylpiperidinyl-4'-oxy]-l ,3,5-triazine of melting point 198-200C. This material gave the following elemental analysis by weight:

Required for C H MO; Found Carbon 65.90% 65.72%

Hydrogen 9.95% 9.85%

Nitrogen 15.37% 15.19%

EXAMPLE 2 38 parts of polypropylene were homogenised with 0.76 part of n-octadecyl-B-(4'-hydroxy-3,5'-di-t-butylphenyl) propionate in a kneading machine over a period of 3 minutes. 0.19 part of the product of Example 1 was then added and homogenisation continued for another 7 minutes.

The homogenised mixture was removed from the kneader and pressed to a thickness of from 2 to 3 mm. in a press.

9 parts of the polypropylene mixture were then charged into a second press in which the press-plates were protected by aluminum foil having a thickness of 0.1 mm. The press was closed and, for 2 minutes, no pressure was applied. The pressure was then increased up to a maximum of 12 tons and this pressure held for 6 minutes, the temperature of the press being 260C. The pressure was released and the material (0.3 mm thick) was cooled under running water.

This material was cut into from 3 to 5 pieces of 35 X 35 mm section and re-charged to the press. The press was closed and no pressure was applied for 2 minutes.

Over another 2 minutes the pressure was increased to 8 tons, the press temperature being 260C. This pressure was maintained for 2 minutes and then the pressure released. The polypropylene foil of 0.1 mm thickness was removed and tempered immediately in a circulating air oven maintained at 150C. over a period of 60 minutes.

A section measuring 44 X mm was separated from the 0.1 mm tempered polypropylene foil and exposed to light irradiation in a fademeter device consisting of a circular bank of 28 alternate sunlight and blacklight lamps. The sunlight lamps were 2 feet long, 20-watt fluorescent lamps characterised by a peak emission of 3,000 Angstrom units; the blacklight lamps were 2 feet long, 40-watt ultraviolet lamps character ised by a peak emission of 3,500 Angstrom units. The sample was rotated concentrically about the bank of lamps so that the radiation therefrom was uniformly distributed over the section under test.

The exposed sample was examined periodically and the time at which the sample reached 50% of the initial elongation was noted.

Table 1 Time to reach 50% Example Additive initial elongation (hours) None (control) 2 2,4,6-tris[2,2'.6',6'- 625 tetramethylpiperidinyM'- oxy]-1,3 ,S-triazinc EXAMPLE 3 230/265I275C. 270C.

400 m./minute 1 5 /137 denier 6 g./denier Extruder temperatures Melt temperature at the dye Spinning Speed Stretching Ratio Titer of Multifilament Tensile Strength The multifilament obtained was mounted on a sample holder of a Xenotest apparatus (Quarzlampen Gmbl-l) using white cardboard as backing. ln intervals of 200 hours of exposure time, 5 fibre samples are measured for their retained tensile strength. The data obtained are plotted against exposure time and the exposure time to give 50% loss of original tensile strength is derived from the graph. This value is taken as the failure time.

The data are shown in the following Table 11 which also includes data relating to a control experiment omitting the product of Example 1.

Table ll-continued Time to Example Additive failure (hours) 3 2,4.6-tris[2.2',6',6'-tetra- 1750 methyl piperidinyl-4-oxy] 1,3.5-triazine EXAMPLE 4 18.5 Parts of cyanuric chloride were slurried in 600 parts of water and treated with 31.4 parts of 4-amino- 2,2,6,6-tetramethylpiperidine. 8 Parts of sodium hydroxide in parts of water were then carefully added and the suspension stirred at room temperature for thirty minutes. The suspension was then heated at 90C for 16 hours and allowed to cool. 39.5 Parts of a colourless solid, 2-ch1oro-4,6-bis-(2',2',6',6'-tetramethylpiperidinyl-4'-amino )-l,3,5-triazine were separated by filtration, washed with water and dried in vacuo. This material of melting point 277278C, showed the following elemental analysis by weight:

Carbon 59.32% 59.54%

Hydrogen 9.25% 9.09%

Nitrogen 23.06% 22.89%

Chlorine 8.36% 8.32%

EXAMPLE 5 12 Parts of the material obtained in Example 4 were warmed in a solution comprising 920 parts of ethanol and 190 parts of water. 9 Parts of 4-amino-2,2,6,6-tetramethylpiperidine were added and the solution heated at reflux for 16 hours. The solution was then evaporated to dryness and treated with 200 parts of water. Filtration afforded 14.0 parts of a colourless solid 2,4,6-tris[2,2',6',6'-tetramethyl piperidinyl-4'- amino] 1 ,3,5-triazine monohydrate which was purified by Soxhlet extraction of the impurities with petroleum ether (of boiling range 6080C.) The residual material of melting point 21 3-2l5C, gave the following elemental analysis by weight:

Required for CmHaTNHH- O Found Carbon 64.12% 64.01% Hydrogen 10.58% 10.42% Nitrogen 22.44% 22.21%

Prolonged heating in vacuo of this compound afforded the anhydrous material of melting point 217 219C.

EXAMPLE 6 8.19 Parts of the material prepared in Example 1 were dissolved in 60 parts of isopropanol and 9 parts of methyl iodide added with water cooling. After 120 hours a solid was separated by filtration and washed with diethyl ether. The solid was dissolved in the minimum amount of water and sodium carbonate added until the solution was basic. Chloroform extraction afforded 2,4,6 tris [l,2,2,6',6'-pentamethylpiperidinyl-4'-oxy]-1,3,S-triazine. This material was crystallised from a 1:1 mixture of chloroform and ethanol to give a colourless solid of melting point 245-247C which gave the following elemental analysis by weight.

Required |'o|'(':;il1,,..H,.() lollnd arhon 67.31% 67.36% Hydrogen 10.27% 10.22% Nitrogen 14.27% 13.99%

EXAMPLE 7 25.8 Parts of 4-hydroxyl-2,2,6,6-tetramethylpiperidin-l-oxyl and 8.4 parts of potassium hydroxide were dissolved in 500 parts of water. 9.2 parts of cyanuric chloride were carefully added and the solution heated at reflux for 2hours. 5 Parts of a solid were filtered off and washed with 20 parts of water followed by 20 parts of boiling petroleum ether (boiling range -l00C). After drying this material 2,4,6-tris[ l '-oxyl-2',2',6',6'- tetramethy1piperidinyl-4-oxy]-1,3,5-triazine, gave a melting point of 192-194C and the following elemental analysis by weight:

Required for CMIHE NHO Found Carbon 60.97% 60.48%

Hydrogen 8.72% 8.56%

Nitrogen 14.22% 13.76%

EXAMPLE 8 14.75 Parts of cyanuric chloride were carefully added to a mixture of 25 parts of 2,2,6,6-tetra methyl piperidin-4-ol and 13.5 parts of sodium bicarbonate in 250 parts of water. The mixture was stirred and heated to give a clear solution. After 6 hours a colourless precipitate had been produced which was filtered after cooling. The solid was washed three times with parts of water and dried in a vacuum oven to give 13.5 parts of 2-chloro-4,6-bis(2,2',6',6-tetra methyl piperidinyl-4-oxy)-1,3,5-triazine monohydrate. This material, of melting point 225-226C, showed the following elemental analysis by weight:

Required for cg Hm N .-,O -(.I.H O Found Carbon 56.79% 56.50%

Hydrogen 8.63% 8.72%

Nitrogen 15.78% 15.71%

Chlorine 7.99% 7.86%

EXAMPLE 9 To 10.4 parts of 4-hydroxy-2,2,6,6-tetra methyl piperidin-l-oxyl in parts of dry benzene were added, in portions, 1.38 parts of sodium. This mixture was heated at reflux for 18 hours and then cooled. 3.7 Parts of cyanuric chloride were added with care and the mixture heated at reflux for 18 hours. On cooling the inorganic salt was removed by filtration and the filtrate evaporated in vacuo. Sublimation in vacuo of the residual solid removed unreacted 4-hydroxy-2,2,6,6- tetra methyl piperidin-l-oxyl and the residue was recrystallised three times from absolute ethanol to yield 2-chloro-4,6-bis(1'-oxyl-2',2',6',6'-tetra methyl piperidinyl-4'-oxy)-1,3,5-triazine. This material had a melting point of l97-199C and showed the following elemental analysis by weight:

Required for (T H .N.-,() .(1 Found Carbon 55.30% 55.24% Hydrogen 7.52% 7.36% Nitrogen 15.36% 15.07% Chlorine 7.78% 8.01%

EXAMPLE To 4.94 parts of l-benzyl-2,2,6,6-tetra methyl piperidin-4-ol in 100 parts of xylene were added, in portions, 0.8 parts of sodium. This mixture was heated at reflux for 18 hours and then cooled. The excess sodium was removed and 1.2 parts of cyanuric chloride added with care. The mixture was stirred at reflux temperature for 3 hours. Evaporation of the solvent in vacuo afforded a solid which was Soxhlet extracted with petroleum ether (of boiling range 80l00C) to give 1.7 parts of a pale yellow solid. column chromatography on silica afforded 2,4,6-tri l-benzyl-2,2,6,6'-tetra methyl piperidinyl-4oxy)-l ,3,5-triazine. This material had a melting point of l25-129C and showed the required spectroscopic features (Infrared, Nuclear Magnetic Resonance Spectroscopy and Mass Spectrometry).

EXAMPLE 1 l 4.8 Parts of 2-chloro-4,6-bis(2',2',6,6-tetra methyl piperidin-4-amino)-l,3,5-triazine were dissolved in a mixture of 300 parts of toluene and 200 parts tertiary butyl alcohol with warming. A solution of 4 parts of the sodium salt of 2,2,6,6-tetra methyl piperidin-4-ol in 40 parts toluene (as prepared in the above Examples) was added dropwise and the mixture heated at reflux for 18 hours. Evaporation of the solution and treatment of the residue with parts of water afforded 4 parts of a colourless solid which was filtered and dried in vacuo. This material, 2,4-bis[2',2',6',6-tetra methyl piperidinyl-4'-amino]-6-[2",2",6",6"-tetra methyl piperidinyl-4"-oxy]- l ,3,5-triazine, was crystallised from methanol and water to give a melting point of 186.5 -l 875C and had the following elemental analysis by weight:

Required for Found C,,H,.N.O.CH,OH Carbon 64.52% 64.67% Hy 10.48% 10.14% Nitrogen 19.43% 19.34%

EXAMPLE l2 4 Parts of 2,4,6-tris[2',2,6',6'-tetra methyl piperidin-4'-amino]-1,3,5-triazine in 100 parts of isopropanol at 5C were treated with 6.4 parts of iodomethane. The mixture was allowed to stand at room temperature for 3 days. Evaporation in vacuo afforded a residue which was treated with saturated sodium carbonate. Filtration and drying in vacuo afforded a colourless solid which was shown by spectroscopic means to be a partially methylated material. This material was dissolved in 180 parts of isopropanol and treated with 4 parts of iodomethane. The mixture was allowed to stand at room temperature for 3 days. Evaporation in vacuo, followed by treatment with saturated sodium carbonate, afforded a colourless solid, 2,4,6-tris( l ,2,- 2',6,6'-pentamethylpiperidinyl-4'-amino)-1,3,5-triazine, which was filtered and dried in vacuo. This material was column chromatographed on alumina and then recrystallised from methanol and water to give a melting point of 235-240C. The compound gave the following elemental analysis by weight:

Required for CMH NWHQO Found Carbon 65.63% 65.36% Hydrogen 10.85% 10.5 3%

EXAMPLE 13 To 4.8 parts of 2-chloro-4,6-bis(2',2,6',6'-tetramethyl piperidinyl-4'-amino)-1,3,5-triazine in a mixture of 100 parts of ethanol and 20 parts of water were added 4 parts of 4-(B-arninoethyl)-2,2,6,6-tetra methyl piperidine. The solution was stirred at reflux for 8 hours and then evaporated in vacuo. The residue was dissolved in 25 parts of chloroform and washed with 50 parts of water. The chloroform phase was dried and evaporated to yield 6.0 parts of a colourless solid 01 melting point C. This material was column chromatographed on alumina to give 2,4-bis(2',2',6',6'- tetra methyl piperidinyl-4-amino)-6-(2",2",6",6"- tetra methyl piperidinyl-4"-ethylenamino)-l,3,5-triazine of melting point 9699C. This substance showed the following elemental analysis by weight:

Required for C H NH Found Carbon 67.20% 66.57%

Hydrogen 10.75% 10.65%

Nitrogen 22.05% 21.56%

EXAMPLE 14 Required C H44N 302C Found Carbon 64.10%

Hydrogen 8.76% 8.94%

Nitrogen l3.83% 13.35%

EXAMPLE 15 5.6 Parts by weight of 2-(2',2',6',6'-tetra methy piperidinyl-4')ethyl alcohol and 1.4 parts by weight c sodium were heated to reflux for 24 hours in 100 part by volume of toluene. To the resulting solution wer added over 20 minutes 1.8 parts by weight of cyanuri chloride in 30 parts by volume of toluene, and the re flux continued for 18 hours. The toluene was then re moved by distillation under reduced pressure and th solid suspended in water, this was extracted with ethe (3 X 50 parts by volume), and the combined extract dried over magnesium sulphate. The ether was It moved by distillation and the residue was triturate with petroleum ether to give a solid which was co lected by filtration, dissolved in 20 parts by volume ethyl alcohol and reprecipitated by the addition of 10 pal-ts by Vlume of water.

Thlli was obtained pure 2,4,6-tris[2',2,6,6'-te ramethyl piperidinyl-4-ethylenoxy]1,3,5-triazim melting at 104-6 and having the following element: analysis b weight:

27 Required ,..H. ...N,.t). Found Carbon 68.51% 68.54% Hydrogen 10.57% 10.48% Nitrogen 13.31% 13.40%

EXAMPLE 16 1.8 Parts by weight of cyanuric chloride and 11.0 parts by weight of 2-(2',2',6',6'-tetramethylpiperidi nyl-4') ethylamine were heated at 160 with stirring for 4 hrs. The resulting mass was cooled and the oil decanted off, this was diluted with 100 parts by volume of water and allowed to stand at room temperature for 24 hours. A solid precipitate was filtered, dried, and recrystallised from ethyl acetate (50 parts by volume) to give pure 2,4,6-trisl2',2',6,6'-tetramethylpiperidinyl- 4ethylenamino]1,3,5-triazine, melting at 169 and having the following elemental analysis by weight:

Required C HtHh-IN. Found ('arbon 68.85% 69.09%

Hydrogen 11.07% 11.16%

Nitrogen 20.07% 20.02%

EXAMPLE 17 Required for C,,H ,N,Cl .HCl Found Carbon 42.30% 42.56% Hydrogen 5.92% 6.00% Nitrogen 20.55% 20.61%

EXAMPLE 18 A solution of 7.4 parts by weight of 2-(2',2',6,6'-tetramethyl piperidinyl-4') ethyl amine in 20 parts by volume of toluene was added dropwise to a stirred solution of 1.85 parts by weight of cyanuric chloride in 80 parts by volume of toluene. The resulting suspension was stirred at room temperature for 24 hours, and the solid then collected by filtration and treated with a 10% solution of sodium hydroxide in water for a further 12 hours.

The resulting solid was collected by filtration, washed repeatedly with water until the aqueous washings were pH 6 7, dried at 60C., and purified by reprecipitation from a chloroform solution by the addition of petroleum ether (boiling range 60 80C.) to give Z-chloro- 4,6-di [2',2',6',6'-tetramethyl piperidinyl-4'- ethylenaminol-l ,3,5-triazine, melting at 168C. and having the following elemental analysis by weight:

Required for C H ClN Found Carbon 62.5% 62.32% Hydrogen 9.7% 9.3% Nitrogen 7.4% 7.65% Chlorine 20.4% 20.45%

28 EXAMPLE 19 38 Parts of polypropylene were homogenised with 0.076 parts of n-octadecyl-fi (4-hydroxy-3',5'-t-butylphenyl) propionate in a kneading machine over a period of 3 minutes at 200C. 0.19 Part of the product of Example 5 was then added and homogenisation was continued for another 7 minutes.

This composition was compression moulded into films of 0.1 mm. thickness at 260C. for 6 minutes and the films so obtained were then quenched in cold water.

A section measuring 44 X 100 mm. was separated from the 0.1 mm. annealed polypropylene foil and exposed to light irradiation in a fademeter device consisting of a circular bank of 28 alternate sunlight and blacklight lamps. The sunlight lamps were 2 feet long, -watt fluorescent lamps characterised by a peak emission of 3,100 Angstrom units; the blacklight lamps 20 were 2 feet long, 20-watt ultra-violet lamps characterised by a peak emission of 3,500 Angstrom units.

The sample was rotated concentrically about the bank of lamps so that the radiation thereupon was uniformly distributed over the section under test.

The exposed sample was examined periodically and portions of it tested to determine the percentage elongation at break, the time (T) at which the sample reached 50% of the initial elongation at break being noted.

A similar test was carried out on a polypropylene sample containing no stabiliser of the invention.

The results obtained are set out in the following Table:

TABLE Factor T/To Time to 50% of initial elongation at breakfl) Ex. Additive (additive) Time to 50% of initial elongation at break for control (To) None 1 l9 2,4,6-Tris(2,2',6',6'- 3.5 45 tetramethyl piperidinyl-4'-amino)- 1,3,5-triazine EXAMPLE 20 5.6 parts of 2-ethylamino-4,6-dich1oro-1,3,5-triazine was slurried in 300 parts of water and the mixture heated to a temperature of C. 4.8 parts of 4-amino- 2,2,6,6-tetramethylpiperidine were then added followed by 30 parts of 1N sodium hydroxide. The mixture was stirred at 55C. for six hours. A colourless solid was then filtered off and washed with 700 parts of warm water. 6.0 parts of Z-ethylamino- 4-chloro-6-(2,2',6,6'-tetramethylpiperidinyl-4'- amino)-1,3,5-triazine were obtained. This material had a melting point of 189 to 191C and gave the following elemental analysis by weight:

Required for C H,,N,Cl Found Carbon 53.74% 53.55% Hydrogen 8.05% 7.96% Nitrogen 11.33% 11.38% Chlorine 26.86% 27.10%

EXAMPLE 21 Using identical conditions to Example 20, 6.2 parts of 2-isopropylamino-4,6-dichloro-l,3,5-triazine were reacted with 4.8 parts of 4-amino-2,2,6,6-tetramethylpiperidine to yield 7 parts of 2-isopropylamino-4- chloro-6-(2',2',6',6'-tetramethylpiperidinyl-4'- amino)-l,3,5-triazine. This substance had a melting point of 174 to 176C and gave the following elemental analysis by weight.

Required for C H N CI Found Carbon 55.11% 54.85% Hydrogen 8.33% 8.04% Nitrogen 25.71% 25.95% Chlorine 10.85% 10.98%

EXAMPLE 22 Using identical conditions to Example 20, 6.7 parts of 2-n-octylthio-4,6-dichloro-l,3,5-triazine were reacted with 3.55 parts of 4-amino2,2,6,6-tetrametl1ylpiperidine to yield 9.1 parts of 2-n-octylthio-4-chloro- 6-( 2',2',6,6'-tetramethylpiperidinyl-4'-amino)-l ,3 ,5- triazine. This material had a melting point of 79 to 81C and gave the following elemental analysis by weight:

Required for C H N CIS Found Carbon 58.01% 57.86% Hydrogen 8.76% 8.73% Nitrogen 16.91% 16.89% Chlorine 8.56% 8.74% Sulphur 7.74% 7.44%

EXAMPLE 23 3.6 parts of 1,2,2,6,6-pentamethylpiperidin-4-ol were heated with 0.6 parts of sodium to reflux temperature in toluene. After 16 hours the solution was cooled, the excess sodium removed and treated with 4.1 parts of 2-ch1oro-4,6-dimethylthio-l,3,5-triazine. The solution was heated at reflux temperature for 18 hours after which it was cooled and filtered free of sodium chloride. The solvent was evaporated under reduced pressure to yield a residue which was crystallised from petroleum ether (of boiling point 6080C Two parts of 2,4-dimethylthio-6-[ 1',2,2',6',6'-pentamethylpiperidinyl-4'-oxy]-l ,3,5-triazine were obtained which showed a melting point of 143 to 145C and gave the following elemental analysis by weight:

2.4 parts of 2-chloro-4,6-bis-[2',2,6',6'-tetramethyl-' piperidinyl-4'-amino]-l,3,5-triazine were treated with 1.2 parts of isopropylamine in 40 parts of water. The solution was stirred at room temperature for 18 hours, at reflux temperature for four hours and then cooled and evaporated to yield 1.6 parts of material. This residue was treated with parts of dilute sodium hydroxide and extracted twice with 50 parts of chloroform. After drying and removal of the solvent a semi-solid material was obtained which on addition of two parts of metanol yielded a colourless solid 2-isopropylamino- 4,6-bis-[2',2',6',6'-tetramethylpiperidinyl-4'-amino]- 1,3,5-triazine of melting point to 122C. It showed the following elemental analysis by weight:

Required for C H N Cl-l oH Found Carbon 62.72% 62.60%

Hydrogen 10.53% 9.98%

Nitrogen 23.42% 23.92%

EXAMPLE 25 0.36 parts of sodium were added to parts of ethanol and the solution treated with 6.6 parts of 2-chloro- 4,6-bis-[2',2,6',6'-tetramethylpiperidinyl-4-amino1- l,3,5triazine. The mixture was stirred and heated at reflux for 16 hours after which the solution was cooled and filtered. Evaporation of the filtrate in vacuo afforded 6.6 parts of a colourless solid which was chromatographed on an alumina column to yield 2-ethoxy- 4,6-bis-(2',2',6,6-tetramethylpiperidinyl-4-amino)- l,3,5-triazine. This material has a melting point of 189 to 191C and gave the following elemental analysis by weight:

Required for C H N O.H,O Found Carbon 61.40% 61 .4191

Hydrogen 10.05% 9.87%

Nitrogen 21.70% 21.46%

EXAMPLE 26 6.28 Parts of 4-amino-2,2,6,6-tetramethylpiperidine were dissolved in 100 parts of toluene and 4.1 parts of 2-chloro-4,6-di(methylthio)-1,3,5-triazine were carefully added. The solution was stirred at reflux temperature for 6 hours. 6 Parts of a solid were filtered off and dried. This material was treated with 30 parts of saturated sodium carbonate solution and extracted with 300 parts of chloroform. The organic extract was dried and evaporated to yield a colourless tacky solid. Column chromatography on alumina afforded pure 2-(2', 2',6,6'tetramethylpiperidinyl-4-amino)-4,6-di(methylthio-l ,3,5-triazine. This material was recrystallized from ethanol and had a melting point of 173 to 175C. It showed the following elemental analysis by weight:

Required for C H N S, Found Carbon 51.36% 51.63%

Hydrogen 7.70% 7.93%

Nitrogen 21.39% 21.45%

EXAMPLE 27 1.4 Parts of sodium and 6.28 parts of 2,2,6,6-tetramethylpiperidin-4-ol was heated at reflux temperature for 24 hours in 100 parts of toluene. To this cooled solution was added 3.86 parts of 2-ethyl-amino-4,6- dichlorol ,3,5-triazine and the mixture heated at reflux for 2 hours. Evaporation of the solvent in vacuo afforded a material which was extracted with chloroform using a Soxhlet extractor. The extract was evaporated to yield a colourless solid which was chromatographed on an alumina column and then crystallised from ethyl acetate, to give pure 2-ethylamino-4,6-bis[2,2',6',6'- tetramethy1piperidinyl-4'-oxy]-1,3,5-triazine which showed a melting point of l89.5 to 190.5 and the following elemental analysis by weight:

Required for C H N o, Found Carbon 63.54% 63.63%

Hydrogen 9.74% 9.77%

Nitrogen 19.34% 19.24%

EXAMPLE 28 3 Parts of 2,4-dichloro-6-(2',2',6',6'-tetramethylpiperidinyl-4'-amino l ,3 ,S-triazine hydrochloric acid salt were dissolved in 400 parts of a 1;l mixture of ethanol and water. 1.18 Parts of n-propyl-amine were added and the solution heated at reflux for 18 hours. Evaporation of the solvent afforded a colourless solid which was crystallised from the solvent mixture methanol/petroleum ether (of boiling range 60-80)\ )/ethyl acetate to give pure 2-chloro-4-n-propyl-amino- 6-( 2 ',2',6,6'-tetramethy1piperidyl-4'-amino)-l,3 ,5- triazine hydrochloric acid salt of melting point greater than 270 and which gave the following analysis by weight:

Required for C,,H,,,N.Cl, Found Carbon 49.61% 49.26%

Hydrogen 7.77% 7.80%

Nitrogen 23.15% 22.54%

EXAMPLE 29 A solution of 2.1 parts by weight of 2-chloro-4,6-di(- methylthio)-1,3,5-triazine and 4.0 parts by wieght of 2( l ,2,2,6',6'-pentamethylpiperidinyl-4 )-ethylamine in 50 parts by volume of toluene was heated at reflux for 4 hours. The toluene was then filtered and removed by distillation under reduced pressure to give a residual oil, which by trituration with petroleum ether (boiling range 4060) gave a white solid. recystallisation from 25 parts by volume of petroleum ether (60-80) gave pure 2-( 1,2',2',6',6-pentamethylpiperidinyl-4'- ethylenamino)-4,6-di(methylthio-1,3,5-triazine, melting at 1 19 and having the following elemental analysis by weight:

Required by C H N S, Found Carbon 55.27% 55.22%

Hydrogen 8.46% 8.62%

Nitrogen 18.96% 19.10%

Sulphur 17.32% 17.15%

EXAMPLE 30 1.5 Parts of 2-chloro-4,6-bis[2',2',6',6'-tetramethylpiperidinyl-4'-amino]-1,3,5-triazine were dissolved in 130 parts of an ethanol/water (:1 mixture and 4 parts of dimethylamine in ethanol solution (33%) added. The mixture was heated in a rocking autoclave at a temperature of 100C and a pressure of 20 atmospheres nitrogen for 24 hours. The solution was filtered and the filtrate evaporated in vacuo to yield a pale brown solid. Charcoal treatment of this material removed the colour and the product was Soxhlet extracted with petroleum ether (of boiling range 60-80) for 24 hours to yield 2-dimethylamino-4,6-bis[2,2',6',- 6'-tetramethylpiperidinyl-4'-amino]-l ,3 ,5-triazine monohydrate as a colourless solid. It showed a melting point of 230 to 233C, a molecular weight of 432 by mass spectrometry and the following elemental analysis by weight:

Required for C H N,.H,O Found Carbon 61.92% 61.31%

Hydrogen 10.25% 10.28%

Nitrogen 24.62% 24.87%

EXAMPLE 31 3 Parts of 2-chloro-4,6-bis[2',2',6',6'-tetramethylpiperidin-yl-4'-amino]-1,3,5-triazine were dissolved in a mixture of 225 parts of ethanol and 46 parts of water with stirring and heating. 1.26 Parts of morpholine were added and the solution heated at reflux for 24 hours. The solution was then evaporated in vacuo and 50 parts of water added. After stirring for 30 minutes the solution was filtered and the filtered material treated with 50 parts of saturated sodium carbonate solution and extracted with 200 parts of chloroform. The extract was dried and evaporated in vacuo to yield 2- morpholino4,6-bis[2',2,6',6'-tetramethylpiperidinyl- 4'-amino]-l ,3,5-triazine dihydrate as a colourless solid of melting point 179l 81C. This solid had a molecular weight of 474 by mass spectrometry and showed the following elemental analysis by weight:

Required for C, H H O.21-l,0 Found Carbon 58.78% 58.60%

Hydrogen 9.87% 9.32%

Nitrogen 21.95% 22.06%

EXAMPLE 32 2.2 Parts of 2-chloro-4,6-bis[2',2',6',6'-tetramethylpiperidiny1-4-amino]-1,3,5-triazine and 1.07 parts of benzylamino were heated at reflux in a mixture of 150 parts of ethanol and 30 parts of water for 18 hours. An evaporation of the solvent, a material was obtained which was chromatographed on an Alumina column. Crystallisation from water gave 2-benzylamino-4,6- bis(2',2',6',6'-tetramethylpiperidinyl-4-amino]-1,3,5- triazine monohydrate as a colourless solid of melting point 98 to 100C. It gave the following elemental analysis by weight:

Required for C H N .H,O Found Carbon 65.60% 65.77%

Hydrogen 9.42% 9.40%

Nitrogen 21.82% 21.81%

EXAMPLE 33 2 Parts of 2-chloro-4,6-bis[2',2',6',6'-tetramethylpiperidinyl-4'-oxy]-l,3,5-triazine and 248 parts of 4- amino-2,2,6,o-tetramethylpiperidine were heated at reflux with a mixture of 42 parts ethanol and 20 parts water for 18 hours. A pure colourless solid was filtered from the solution which had a melting point of over 280C and a molecular weight of 406 by mass spectrometry. This material was the hydrochloric acid salt of 2-am'mo-4,6-bis[2,2,6,6'-tetramethylpiperidinyl- 4'-amino]-l .3,5-triazine and showed the following elemental analysis by weight:

Required for C, H ,.N,O,.HCl Found Carbon 56.92% 56.96% Hydrogen 5.87% 8.71% Nitrogen 18.97% 19.28%

34 EXAMPLE 34 straightor branched alkyl of l to 20 carbon atoms, an alkenyl or alkynyl of 3 to 12 carbon atoms, an aralkyl 3.6? t. f246-t'hl ar g "c ompynmldme were dissolved havingfrom 7 to l 1 carbon atoms or the group in a mixture of 12 parts of water and 20 parts of dioxane and the solution stirred and cooled to C. 3 Parts 5 of 4-amino-2,2,6,o-tetramethylpiperidine were then added slowly maintaining a temperature of below C. R,

0.8 Parts of sodium hydroxide in 2 parts of water were added and the solution stirred at room temperature for l hour. 4.4 Parts of 4-amino-2,2,6,6-tetrarnethylpiperi 10 dine were then added followed by 0.8 parts sodium hydroxide in 2 parts of water. The resultant solution was then stirred at reflux temperature for 18 hours. A solid material was filtered off, treated with l00 parts of saturated sodium carbonate solution and extracted with 200 parts of chloroform. The extract was dried and wherein R9 is a hydrogen or alkyl of l to 20 carbon wherein R is hydrogen, methyl or phenyl; n is O or 1; and A is CH or the group evaporated to yield asolid,6-chloro-2,4-bis[2',2',6',6- atoms; Z" d Z are the same y P W f 'W l Q'Py or different and each is a piperidine group of formula ll monohydrate wh'ch was recrystallized from chlOrO- as hereinbefore defined, a halogen atom, a substituted form/petroleum ether (of boiling range 4060) to 20 amino group h vi th formula: give a melting point of l8 to 199.5C and the following elemental analysis by weight: Ill

wherein R and R are the same of different and each Required for C,,H,,N,CLH,O Found is hydrogen a straight or branched alkyl of l to 20 car- 599m 59-63% bon atoms, a cycloalkyl of 5 to l2 carbon atoms, an

Hydrogen 9.37% 9.l 1% Nitrogen 905% 18.75% aryl WhlCh IS unsubstituted or substituted with one or more alkyl groups and having a total of from 6 to 18 carbon atoms or an aralkyl having from 7 to 12 carbon atoms, or R and R together with the nitrogen atom to l which they are bound, form a nitrogen containing ring c d f h f I having 5 to 7 ring atoms; or Z" and Z' are a hydroxy A compoun o t e a or an ether group having the formula:

OR, [V

2" wherein R, is hydrogen, a straight or brached chain alkyl of l to 20 carbon atoms, a cycloalkyl of 5 to 12 carbon atoms, an aryl which is unsubstituted or substil tuted by one or more alkyl groups and having a total of I 40 6 to 18 carbon atoms, or an aralkyl having from 7 to 12 I carbon atoms; Z or Z" and Z are a thiol or thio ether group having the formula: and salts thereof, Z is a group having the formula:

wherein R, is hyrogen, a straight or branched alkyl of l to 20 carbon atoms or a cycloalkyl of S to 12 carbon CH atoms.

3 CH 2. A compound according to claim 1 having the for- 3 mula x (A n N-Y II D" L R N I N wherein R and R, are the same or different and each is a straight or branched alkyl of l to 12 carbon atoms or D'" R and R form together with the ring carbon atom to which they are bound, a cycloalkyl group having from 50 5 to 12 carbon atoms;

and salts thereof, where D, D" and D' are the same or different and each is halogen or a group of the formula:

CH X is -0, -S or -N, wherein 3 CH3 I y IIA :1 wherein R is hydrogen, a straightor branched alkyl of I R l to 20 carbon atoms or benzyl; Y is 0, hydrogen, a 1

wherein R, and R are the same or different and each is a straight or branched alkyl of l to l2 carbon atoms,

Yll

or R, and R',, together with the carbon atom to which they are bound, form a cycloalkyl of 5 to 12 carbon atoms, X is an O, S0r R, wherein R, is hydrogen, an alkyl of l to 12 carbon atoms or an aralkyl of 7 to 12 carbon atoms Y' is 0, hydrogen, an alkyl of l to 12 carbon atoms, an alkenyl or alkynyl of 3 to 12 carbon atoms, an aralkyl of 7 to 12 carbon atoms or the group:

wherein R,, is hydrogen, or a methyl or phenyl, n is 0 or i and A is CH,, CH,CH,- or

wherein R, is an alkyl of l to 12 carbon atoms, with the proviso that at least one of D, D" and D'" is not a halogen atom.

3. A compound according to claim 2, wherein X is O- or Nl-l, n is O, R, and R, are each methyl and Y is hydrogen or a methyl.

4. A compound according to claim 2, wherein D, D

5. A compound according the claim 1 having the formula:

H IC

RI 3 BN2 and salts thereof, wherein R", and R", are the same or different and each is a straight or branched chain alkyl group having from 1 to 12 carbon atoms or R", and R",, together with the carbon atom to which they are each bound, form a cycloalkyl of 5 to 12 carbon atoms, and Y", is hydrogen a straight or branched chain alkyl group having from 1 to l2 carbon atoms, an alkenyl group having from 3 to 12 carbon atoms or an aralkyl group having from 7 to 12 carbon atoms 6. A compound according to claim 5, wherein R", and R", are each methyl and Y" is hydrogen or a methyl.

40 7. A compound according to claim 1 which is 2,4,6-

5 1,3 ,5-triazine.

9. A compound according to claim 1 which is 2,4,6- tris-[ l '2',2',6,6pentamethylpiperidinyl-4-oxy]- 1,3 ,S-trizine.

10. A compound according to claim 1 which is 2,4,6-

I ,3,5-triazine.

11. A compound according to claim 1 which is 2- chloro-4,6-bis-[ l '-oxyl-2',2',6',6',-tetramethylpiperidinyl-4'-oxy]-l ,3,5-triazine.

and D are the same or different piperidine of formula "A- i i l

Claims (11)

1. A COMPOUND OF THE FROMULA

2. A compound according to claim 1 having the formula

3. A compound according to claim 2, wherein X is - O- or -NH, n is O, R1 and R2 are each methyl and Y is hydrogen or a methyl.

4. A compound according to claim 2, wherein D, D and D are the same or different piperidine of formula IIA.

5. A compound according the claim 1 having the formula:

6. A compound according to claim 5, wherein R''''1 and R''''2 are each methyl and Y'''' is hydrogen or a methyl.

7. A compound according to claim 1 which is 2,4,6-tris(2'',2'',6'', 6''-tetramethylpiperidinyl-4''-oxy)-1,3,5-triazine.

8. A compound according to claim 1 which is 2,4,6-tris)2'',2'',6'', 6''-tetramethyl piperidinyl-4''-amino)-1,3,5-triazine.

9. A compound according to claim 1 which is 2,4,6-tris-(1''2'',2'', 6'',6''-pentamethylpiperidinyl-4''-oxy)-1,3,5-trizine.

10. A compound aCcording to claim 1 which is 2,4,6-tris-(1-oxyl-2'',2'',6'',6''-tetramethylpiperidinyl-4''-oxyl)-1,3,5 -triazine.

11. A compound according to claim 1 which is 2-chloro-4,6-bis-(1''-oxyl-2'',2'',6'',6'',-tetramethyl-piperidinyl-4''-oxy)-1,3,5-triazine.